This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 2 |
| 3 | 43 |
| 4 | 79 |
| 5 | 241 |
| 6 | 727 |
| 7 | 3643 |
| 8 | 15307 |
| 9 | 19681 |
| 10 | 164023 |
| 11 | 1673053 |
| 12 | 885733 |
| 13 | 2657203 |
| 14 | 18600433 |
| 15 | 23914843 |
| 16 | 100442347 |
| 17 | 358722673 |
| 18 | 645700813 |
| 19 | 4519905703 |
| 20 | 18983603959 |
| 21 | 48427561123 |
| 22 | 31381059607 |
| 23 | 261508830073 |
| 24 | 1307544150373 |
| 25 | 3295011258943 |
| 26 | 24006510600883 |
| 27 | 12709329141643 |
| 28 | 53379182394907 |
| 29 | 190639937124673 |
| 30 | 2615579937350539 |